SQL查询以获得平均值，如下所示或如何使用hibernate标准

SELECT AVG(column_name) FROM table_name;

// 配置Hibernate的数据库连接信息
Configuration configuration = new Configuration();
configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
configuration.setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
configuration.setProperty("hibernate.connection.url", "jdbc:mysql://localhost:3306/mydatabase");
configuration.setProperty("hibernate.connection.username", "myusername");
configuration.setProperty("hibernate.connection.password", "mypassword");

// 创建一个实体类
@Entity
@Table(name = "mytable")
public class MyEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "value")
    private Integer value;

    // 省略getter和setter方法
}

// 使用Hibernate的Session对象执行SQL查询
Session session = configuration.buildSessionFactory().openSession();
Transaction transaction = session.beginTransaction();

Query query = session.createQuery("SELECT AVG(value) FROM MyEntity");
Double averageValue = (Double) query.uniqueResult();

transaction.commit();
session.close();

System.out.println("Average value: " + averageValue);